It That Betrays [Duel Decks: Zendikar vs. Eldrazi] Archon Whenever Ohran Viper deals combat

Whenever Ohran Viper deals combat damage to a player

I don't think they exist

Set: Outlaws of Thunder Junction Commander Type: Creature — Snake Rarity: Rare Cost: {1}{G} Reach

each player returns all creature cards from their graveyard to the battlefield

Set: Commander Masters Type: Creature — Kor Cleric Rarity: Rare Cost: {4}{W} Whenever an enchantment enters the battlefield under your control

It That Betrays [Duel Decks: Zendikar vs. Eldrazi] Archon Whenever Ohran Viper deals combatSet: Duel Decks: Zendikar vs. Eldrazi Type: Creature Eldrazi Rarity: Rare Cost: {12} Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents.) Whenever an opponent sacrifices a nontoken permanent, put that card onto the battlefield under your control. Your pleas for death shall go unheard.